#include "door_bell_wifi.h"

static EventGroupHandle_t wifi_event_group;
static const char *TAG = "WiFi";
const int WIFI_CONNECTED_EVENT = BIT0;
#define PROV_TRANSPORT_BLE "ble"
#define PROV_QR_VERSION "v1"
#define QRCODE_BASE_URL "https://espressif.github.io/esp-jumpstart/qrcode.html"

WiFI_Callback connect_succ_callback;
WiFI_Callback connect_fail_callback;

/* Event handler for catching system events */
static void event_handler(void *arg, esp_event_base_t event_base,
                          int32_t event_id, void *event_data)
{

    static int retries;

    static int connect_retries;

    if (event_base == WIFI_PROV_EVENT)
    {
        switch (event_id)
        {
        case WIFI_PROV_START:
            ESP_LOGI(TAG, "Provisioning started");
            break;
        case WIFI_PROV_CRED_RECV:
        {
            wifi_sta_config_t *wifi_sta_cfg = (wifi_sta_config_t *)event_data;
            ESP_LOGI(TAG, "Received Wi-Fi credentials"
                          "\n\tSSID     : %s\n\tPassword : %s",
                     (const char *)wifi_sta_cfg->ssid,
                     (const char *)wifi_sta_cfg->password);
            break;
        }
        case WIFI_PROV_CRED_FAIL:
        {
            wifi_prov_sta_fail_reason_t *reason = (wifi_prov_sta_fail_reason_t *)event_data;
            ESP_LOGE(TAG, "Provisioning failed!\n\tReason : %s"
                          "\n\tPlease reset to factory and retry provisioning",
                     (*reason == WIFI_PROV_STA_AUTH_ERROR) ? "Wi-Fi station authentication failed" : "Wi-Fi access-point not found");

            retries++;
            if (retries >= 5)
            {
                ESP_LOGI(TAG, "Failed to connect with provisioned AP, reseting provisioned credentials");
                wifi_prov_mgr_reset_sm_state_on_failure();
                retries = 0;
            }

            break;
        }
        case WIFI_PROV_CRED_SUCCESS:
            ESP_LOGI(TAG, "Provisioning successful");

            retries = 0;

            break;
        case WIFI_PROV_END:
            /* De-initialize manager once provisioning is finished */
            wifi_prov_mgr_deinit();
            break;
        default:
            break;
        }
    }
    else if (event_base == WIFI_EVENT)
    {
        switch (event_id)
        {
        case WIFI_EVENT_STA_START:
            esp_wifi_connect();
            break;
        case WIFI_EVENT_STA_DISCONNECTED:
            ESP_LOGI(TAG, "Disconnected. Connecting to the AP again...");
            connect_retries++;
            if (connect_retries >= 5)
            {
                connect_retries = 0;
                if (connect_fail_callback)
                {
                    connect_fail_callback();
                }
                // wifi_prov_mgr_reset_provisioning(); /* 清除配网信息 */
                // esp_restart();                      /* 重新启动 */
            }

            esp_wifi_connect();
            break;
        default:
            break;
        }
    }
    else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
    {
        ip_event_got_ip_t *event = (ip_event_got_ip_t *)event_data;
        ESP_LOGI(TAG, "Connected with IP Address:" IPSTR, IP2STR(&event->ip_info.ip));
        connect_retries = 0;
        if (connect_succ_callback)
        {
            connect_succ_callback();
        }
    }
    else if (event_base == PROTOCOMM_TRANSPORT_BLE_EVENT)
    {
        switch (event_id)
        {
        case PROTOCOMM_TRANSPORT_BLE_CONNECTED:
            ESP_LOGI(TAG, "BLE transport: Connected!");
            break;
        case PROTOCOMM_TRANSPORT_BLE_DISCONNECTED:
            ESP_LOGI(TAG, "BLE transport: Disconnected!");
            break;
        default:
            break;
        }
    }
    else if (event_base == PROTOCOMM_SECURITY_SESSION_EVENT)
    {
        switch (event_id)
        {
        case PROTOCOMM_SECURITY_SESSION_SETUP_OK:
            ESP_LOGI(TAG, "Secured session established!");
            break;
        case PROTOCOMM_SECURITY_SESSION_INVALID_SECURITY_PARAMS:
            ESP_LOGE(TAG, "Received invalid security parameters for establishing secure session!");
            break;
        case PROTOCOMM_SECURITY_SESSION_CREDENTIALS_MISMATCH:
            ESP_LOGE(TAG, "Received incorrect username and/or PoP for establishing secure session!");
            break;
        default:
            break;
        }
    }
}

void door_bell_wifi_Init(void)
{
    /* Initialize NVS partition */
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
    {
        /* NVS partition was truncated
         * and needs to be erased */
        nvs_flash_erase();

        /* Retry nvs_flash_init */
        nvs_flash_init();
    }

    /* Initialize TCP/IP */
    esp_netif_init();

    /* Initialize the event loop */
    ESP_ERROR_CHECK(esp_event_loop_create_default());
    wifi_event_group = xEventGroupCreate();

    /* Register our event handler for Wi-Fi, IP and Provisioning related events */
    esp_event_handler_register(WIFI_PROV_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL);

    ESP_ERROR_CHECK(esp_event_handler_register(PROTOCOMM_TRANSPORT_BLE_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));

    ESP_ERROR_CHECK(esp_event_handler_register(PROTOCOMM_SECURITY_SESSION_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
    ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));

    /* Initialize Wi-Fi including netif with default config */
    esp_netif_create_default_wifi_sta();

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    /* Configuration for the provisioning manager */
    wifi_prov_mgr_config_t config = {
        /* What is the Provisioning Scheme that we want ?
         * wifi_prov_scheme_ble */
        .scheme = wifi_prov_scheme_ble,
        .scheme_event_handler = WIFI_PROV_SCHEME_BLE_EVENT_HANDLER_FREE_BTDM};
    /* Initialize provisioning manager with the
     * configuration parameters set above */
    ESP_ERROR_CHECK(wifi_prov_mgr_init(config));
}

esp_err_t custom_prov_data_handler(uint32_t session_id, const uint8_t *inbuf, ssize_t inlen,
                                   uint8_t **outbuf, ssize_t *outlen, void *priv_data)
{
    if (inbuf)
    {
        ESP_LOGI(TAG, "Received data: %.*s", inlen, (char *)inbuf);
    }
    char response[] = "SUCCESS";
    *outbuf = (uint8_t *)strdup(response);
    if (*outbuf == NULL)
    {
        ESP_LOGE(TAG, "System out of memory");
        return ESP_ERR_NO_MEM;
    }
    *outlen = strlen(response) + 1; /* +1 for NULL terminating byte */

    return ESP_OK;
}

static void get_device_service_name(char *service_name, size_t max)
{
    uint8_t eth_mac[6];
    const char *ssid_prefix = "Ming_";
    esp_wifi_get_mac(WIFI_IF_STA, eth_mac);
    snprintf(service_name, max, "%s%02X%02X%02X",
             ssid_prefix, eth_mac[3], eth_mac[4], eth_mac[5]);
}

static void wifi_prov_print_qr(const char *name, const char *username, const char *pop, const char *transport)
{
    if (!name || !transport)
    {
        ESP_LOGW(TAG, "Cannot generate QR code payload. Data missing.");
        return;
    }
    char payload[150] = {0};

    snprintf(payload, sizeof(payload), "{\"ver\":\"%s\",\"name\":\"%s\""
                                       ",\"transport\":\"%s\"}",
             PROV_QR_VERSION, name, transport);

    ESP_LOGI(TAG, "Scan this QR code from the provisioning application for Provisioning.");
    esp_qrcode_config_t cfg = ESP_QRCODE_CONFIG_DEFAULT();
    esp_qrcode_generate(&cfg, payload);

    ESP_LOGI(TAG, "If QR code is not visible, copy paste the below URL in a browser.\n%s?data=%s", QRCODE_BASE_URL, payload);
}

static void wifi_init_sta(void)
{
    /* Start Wi-Fi in station mode */
    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
    ESP_ERROR_CHECK(esp_wifi_start());
}

void door_bell_wifi_start(WiFI_Callback succ_callback, WiFI_Callback fail_callback)
{

    connect_succ_callback = succ_callback;
    connect_fail_callback = fail_callback;

    bool provisioned = false;
    /* Let's find out if the device is provisioned */
    ESP_ERROR_CHECK(wifi_prov_mgr_is_provisioned(&provisioned));
    /* If device is not yet provisioned start provisioning service */
    if (!provisioned)
    {
        ESP_LOGI(TAG, "Starting provisioning");

        /* What is the Device Service Name that we want
         * This translates to :
         *     - Wi-Fi SSID when scheme is wifi_prov_scheme_softap
         *     - device name when scheme is wifi_prov_scheme_ble
         */
        char service_name[12];
        get_device_service_name(service_name, sizeof(service_name));

        const char *service_key = NULL;

        uint8_t custom_service_uuid[] = {
            /* LSB <---------------------------------------
             * ---------------------------------------> MSB */
            0xb4,
            0xdf,
            0x5a,
            0x1c,
            0x3f,
            0x6b,
            0xf4,
            0xbf,
            0xea,
            0x4a,
            0x82,
            0x03,
            0x04,
            0x90,
            0x1a,
            0x02,
        };

        wifi_prov_scheme_ble_set_service_uuid(custom_service_uuid);

        /* An optional endpoint that applications can create if they expect to
         * get some additional custom data during provisioning workflow.
         * The endpoint name can be anything of your choice.
         * This call must be made before starting the provisioning.
         */
        wifi_prov_mgr_endpoint_create("custom-data");

        /* Start provisioning service */
        ESP_ERROR_CHECK(wifi_prov_mgr_start_provisioning(WIFI_PROV_SECURITY_0, (const void *)NULL, service_name, service_key));

        /* The handler for the optional endpoint created above.
         * This call must be made after starting the provisioning, and only if the endpoint
         * has already been created above.
         */
        wifi_prov_mgr_endpoint_register("custom-data", custom_prov_data_handler, NULL);

        /* Uncomment the following to wait for the provisioning to finish and then release
         * the resources of the manager. Since in this case de-initialization is triggered
         * by the default event loop handler, we don't need to call the following */
        // wifi_prov_mgr_wait();
        // wifi_prov_mgr_deinit();
        /* Print QR code for provisioning */

        wifi_prov_print_qr(service_name, NULL, NULL, PROV_TRANSPORT_BLE);
    }
    else
    {
        ESP_LOGI(TAG, "Already provisioned, starting Wi-Fi STA");

        /* We don't need the manager as device is already provisioned,
         * so let's release it's resources */
        wifi_prov_mgr_deinit();

        /* Start Wi-Fi station */
        wifi_init_sta();
    }

    /* Wait for Wi-Fi connection */
    // xEventGroupWaitBits(wifi_event_group, WIFI_CONNECTED_EVENT, true, true, portMAX_DELAY);
}
